Mahout Learning (1)

Mahout home: http://mahout.apache.org/

Mahout Maven:

<dependency>    <groupId>org.apache.mahout</groupId>    <artifactId>mahout-core</artifactId>    <version>0.9</version></dependency>

Reference: http://mahout.apache.org/users/recommender/userbased-5-minutes.html

Example:

public class TMahout {    public static void main(String[] args) throws IOException, TasteException {        DataModel model = new FileDataModel(new File("path/dataset.csv"));        UserSimilarity similarity = new PearsonCorrelationSimilarity(model);        UserNeighborhood neighborhood = new ThresholdUserNeighborhood(0.1, similarity, model);        UserBasedRecommender recommender = new GenericUserBasedRecommender(model, neighborhood, similarity);        List<RecommendedItem> recommendations = recommender.recommend(2, 3);        for (RecommendedItem recommendation : recommendations) {            System.out.println(recommendation);        }        RecommenderEvaluator evaluator = new AverageAbsoluteDifferenceRecommenderEvaluator();        RecommenderBuilder builder = new RecommenderBuilder() {            @Override            public Recommender buildRecommender(DataModel dataModel) throws TasteException {                UserSimilarity similarity = new PearsonCorrelationSimilarity(dataModel);                UserNeighborhood neighborhood = new ThresholdUserNeighborhood(0.1, similarity, dataModel);                return new GenericUserBasedRecommender(dataModel, neighborhood, similarity);            }        };        double result = evaluator.evaluate(builder, null, model, 0.9, 1.0);        System.out.println(result);    }}

 

Mahout Learning (1)